By the way... Can't believe the 180 I flipped on this decision... But I've got an 18490 lasting me pretty much all day, and I swap the bottle out before I head home because I like squonking a full bottle. Voltage when I get home? 3.7 so either I'm hitting it less ( doesn't feel like it) or the "vapable" voltage on the aw imr's 18490 and 1600 18650 last pretty much the same time, and it's the garbage under voltage that makes up the difference in mah. Shrug
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